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Unzip a ZIP Entry Directly into a BinData Object Using ZipEntry.UnzipToBd

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This example demonstrates how to use the ZipEntry.UnzipToBd method to inflate a ZIP entry directly into a BinData object.

The entry contents are uncompressed entirely in memory without creating a file on disk.

This is useful when:

• Processing ZIP entry data entirely in memory
• Avoiding temporary filesystem files
• Working with binary files such as images, PDFs, or certificates
• Passing uncompressed ZIP data directly to other APIs

The example opens a ZIP archive, locates a PDF entry, inflates it into a BinData object, and then writes the uncompressed bytes to a new file.

Suppose the ZIP archive contains:

docs/report.pdf

The entry is uncompressed directly into memory before optionally being saved to:

qa_output/report.pdf

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Local $bSuccess = False

$oZip = ObjCreate("Chilkat.Zip")

; Open an existing ZIP archive.
$bSuccess = $oZip.OpenZip("qa_data/zips/documents.zip")
If ($bSuccess = False) Then
    ConsoleWrite($oZip.LastErrorText & @CRLF)
    Exit
EndIf

; Locate the PDF entry within the ZIP archive.
$oEntry = ObjCreate("Chilkat.ZipEntry")

$bSuccess = $oZip.EntryOf("docs/report.pdf",$oEntry)
If ($bSuccess = False) Then
    ConsoleWrite("ZIP entry not found." & @CRLF)
    $oZip.CloseZip 
    Exit
EndIf

; ------------------------------------------------------------
; Inflate the ZIP entry directly into a BinData object.
; 
; The uncompressed bytes are stored entirely in memory.
; 
$oPdfData = ObjCreate("Chilkat.BinData")

$bSuccess = $oEntry.UnzipToBd($oPdfData)
If ($bSuccess = False) Then
    ConsoleWrite($oEntry.LastErrorText & @CRLF)
    Exit
EndIf

ConsoleWrite("Uncompressed size = " & $oPdfData.NumBytes & @CRLF)
ConsoleWrite("" & @CRLF)

; ------------------------------------------------------------
; Optionally save the uncompressed bytes to a file.
; 
$bSuccess = $oPdfData.WriteFile("qa_output/report.pdf")
If ($bSuccess = False) Then
    ConsoleWrite($oPdfData.LastErrorText & @CRLF)
    Exit
EndIf

$oZip.CloseZip 

ConsoleWrite("PDF extracted successfully." & @CRLF)